system76-coreboot/payloads/libpayload/curses/PDCurses/demos/rain.c

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/* $Id: rain.c,v 1.11 2008/07/13 16:08:17 wmcbrine Exp $ */

#include <curses.h>
#include <stdlib.h>
#include <time.h>

/* rain 11/3/1980 EPS/CITHEP */

static int next_j(int j)
{
    if (j == 0)
        j = 4;
    else
        --j;

    if (has_colors())
    {
        int z = rand() % 3;
        chtype color = COLOR_PAIR(z);

        if (z)
            color |= A_BOLD;

        attrset(color);
    }

    return j;
}

int main(int argc, char *argv[])
{
    int x, y, j, r, c, seed;
    static int xpos[5], ypos[5];

#ifdef XCURSES
    Xinitscr(argc, argv);
#else
    initscr();
#endif
    seed = time((time_t *)0);
        srand(seed);

    if (has_colors())
    {
        int bg = COLOR_BLACK;

        start_color();

#if defined(NCURSES_VERSION) || (defined(PDC_BUILD) && PDC_BUILD > 3000)
        if (use_default_colors() == OK)
            bg = -1;
#endif
        init_pair(1, COLOR_BLUE, bg);
        init_pair(2, COLOR_CYAN, bg);
    }

    nl();
    noecho();
    curs_set(0);
    timeout(0);
    keypad(stdscr, TRUE);

    r = LINES - 4;
    c = COLS - 4;

    for (j = 5; --j >= 0;)
    {
        xpos[j] = rand() % c + 2;
        ypos[j] = rand() % r + 2;
    }

    for (j = 0;;)
    {
        x = rand() % c + 2;
        y = rand() % r + 2;

        mvaddch(y, x, '.');

        mvaddch(ypos[j], xpos[j], 'o');

        j = next_j(j);
        mvaddch(ypos[j], xpos[j], 'O');

        j = next_j(j);
        mvaddch(ypos[j] - 1, xpos[j], '-');
        mvaddstr(ypos[j], xpos[j] - 1, "|.|");
        mvaddch(ypos[j] + 1, xpos[j], '-');

        j = next_j(j);
        mvaddch(ypos[j] - 2, xpos[j], '-');
        mvaddstr(ypos[j] - 1, xpos[j] - 1, "/ \\");
        mvaddstr(ypos[j], xpos[j] - 2, "| O |");
        mvaddstr(ypos[j] + 1, xpos[j] - 1, "\\ /");
        mvaddch(ypos[j] + 2, xpos[j], '-');

        j = next_j(j);
        mvaddch(ypos[j] - 2, xpos[j], ' ');
        mvaddstr(ypos[j] - 1, xpos[j] - 1, "   ");
        mvaddstr(ypos[j], xpos[j] - 2, "     ");
        mvaddstr(ypos[j] + 1, xpos[j] - 1, "   ");
        mvaddch(ypos[j] + 2, xpos[j], ' ');

        xpos[j] = x;
        ypos[j] = y;

        switch (getch())
        {
        case 'q':
        case 'Q':
            curs_set(1);
            endwin();
            return EXIT_SUCCESS;
        case 's':
            nodelay(stdscr, FALSE);
            break;
        case ' ':
            nodelay(stdscr, TRUE);
#ifdef KEY_RESIZE
            break;
        case KEY_RESIZE:
# ifdef PDCURSES
            resize_term(0, 0);
            erase();
# endif
            r = LINES - 4;
            c = COLS - 4;
#endif
        }
        napms(50);
    }
}